Missing price

Good afternoon.

site: lairial.eu
Plugin : Variations Swatches for WooCommerce (I contacted the support of this plugin, no solution from them)

For customize product pages, we use a plugin with variations.

Recently, there is such a problem -> all the variations are loaded and when we add the price, we see this message :

“one variation does not have a price”.

I looked through all the variations manually, there is a price everywhere, I started the mechanism again -> it’s still a message.

What is the problem?

Thank you

Regards